Steam-engine.



PATENTED MAR. 22, 1904.

W. H. STOHLMANN.

STEAM ENGINE. APPLIOATION FILED MAY 25, 1903- N0 MODEL.

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Patented March 22, 1904.

PATENT EEicE.

WILLIAM H. STOHLMANN,

OF GILMORE, NEBRASKA.

STEAM-ENGINE.

,, SPECIFICATION forming part of Letters Patent No. 755,410, dated March 22, 1904:.

Application filed May 25, 1908. Serial No. 158,641. (No model.)

To all whom, it may concern:

Be it known that I, WILLIAM H. STOHL- MANN, a citizen of the United States, residing at Gilmore, in the county of Sarpy and State of Nebraska, have invented a new and useful Steam-Engine, of which the following is a specification.

My invention relates to rotary engines; and it consists in the features and combination and arrangement of parts hereinafter described, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a side View of the engine with parts broken away and parts in section. Fig. 2 is a sectional view of Fig. 1 on the line 2 2 thereof. Fig. 3 is a sectional view of Fig. 1 on the line 3 3 thereof. Fig. 1 is a detail sectional view on the line 1 1 of Fig. 1. Fig. 5 is a detail sectional View similar to Fig. 4 on the line 5 5 of Fig. 1. Fig. 6 is a detail view of one of the abutments. Fig. 7 is a plan View of the reversing-valve, its operating means, and the pipe connections leading to the valve. Fig. 8 is a detail View, in side elevation, of one-half of the expansion-ring of the engine; and Fig. 9 is a front view of Fig. 8. Fig.10 is a detail view showing connections for operating the valve.

In the drawings, I is an expansion-ring having lugs D extending laterally therefrom, through which rods 1 pass, said rods being supported on the foundation-beams L. Be-

- tween these foundation-beams and the lugs D springs 2 are interposed surrounding the rods 1 and serving to keep the expansion-ring in normal position under normal conditions, but adapted to allow it to move under the conditions hereinafter named. This expansionring is combined with a movable steam-chest 1, which, as shown in Figs. 2 and 3, is of rectangular cross-section, having inwardly-extending flanges o, engaging ribs or flanges on the outer edges of the expansion-ring. The steam-chest is formed of two sections 5 6, bolted together at 7, and said steam-chest carries at opposite points G G two rotary valves, which are seated, as shown in Figs. 4: and 5, in enlargements 9 of the steam chest. The steam-chest embraces the expansion-ring, as shown, and is adapted to rotate thereon. The

said steam-chest has its flanges 10 connected with'spokes 11, extending to a central hub 12, from which the power may be taken as desired. The valves G and G have inwardlyeXtending flanges as at their outer ends,-and they have a steam-passage Fextending through them, as shown in Figs. 1 and 5. They are connected with valve stems 11, eXtending radially inward through plate 12, secured to the steam-chest, the said stems being screwthreaded at 13 through bosses 14: of the said plate 12, and at their inner ends the stems are guided in ways 15, formed in the plates or boxes 16, carried by the spokes of the steam-chest. The valve-stems are pressed outwardly by springs 17, seated in the ways 15. The expansion-ring is provided with abutments 18 18 at the lower portion,said abutments serving for the steam to act against in connection with the valves, as will be hereinafter described. The expansion-ring is also provided with an eccentric inner surface, the said ring being of one thickness in its upper half, or from E to E, and being of gradually-ole creasing thickness from these points E and E to the points d. It will be seen from Fig. 1 that the valves bear upon the inner side of the expansion-ring, and consequently acquire a radial reciprocatory movement as they pass around the inner side of the said expansionring, and this reciprocating movement of the valves causes them to be rotated, by reason of the screw 18, on their stems working through the bosses 14 on the plates 12, secured to the steam-chest. The abutments 18 18' are fixed to the expansion-ring and have grooves at 19 in their side and end edges to receive suitable packing. They also have plungcrs 20, working laterally and pressed outwardly by a spring 21, so as to close notches 22, formed in the side edges of the said abutments. These notches are of proper size to allow the flanges a: of the rotary valves to pass by, and, as shown in Fig. 5, the side flanges w are inclined at their ends, so that in passing the abutments the spring packing-plungers 20 will be pressed backwardly or inwardly, and as soon as the valve passes the abutment the side plungers will be forced outwardly by the spring 21.

Steam is admitted to the engine through which the openings in the valves are fitted, said valves having radial movement and screwthreaded stems passing through nuts carried by the steam-chest with springs for pressing the valve-stems outwardly, substantially as described.

6. In combination in a rotary engine a ring, a valve-chest rotating thereon and havingrotary valves, abutment means carried by the ring and means for rotating the valves, the said ring'having channels y in its lower portion for the escape of steam past the valves, substantially as described.

7. In combination in a rotary engine, a ring yieldingly supported, a steam-chest adapted to rotate on the said ring, abutment means carried by the ring, valves carried by the steam-chest, a steam-supply valve, a connection between the same and the steam-chest and means for controlling the position of the said Valve from the position of the ring.

8. In combination in a rotary engine a ring yieldingly supported, a rotary steam-chest, valves carried thereby, abutment means carried by the ring, a steam-supply valve and a lever between the said ring and the supplyvalve for operating the same automatically according to the position of the ring, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WM. H. STOHLMANN.

Witnesses:

JOHN GUSTAFSON, ED. B. PRINDLE. 

